I was thinking about the what would make sense for the Great Lighthouse to do since its implemented and has no effects and I think that the buffs given from The Great Lighthouse should be Double Stats from all water trade goods in the town that it is constructed in.

Perhaps it could give some sort of buff to culture, because that seems like it could be a bit realistic, because with a lighthouse, you can see farther. So maybe in the host town, culture rate is buffed by a %?

Scout towers already scout a distance of i think 400 blocks from where it is located inside or outisde your culture personally I think that it isnt a very good idea because scout towers can already see far enough and if we are talking about sight which you have all got me thinking about.